EVOLUTION OF BARRIERS TO CROSSING OF SELF-INCOMPATIBLE WITH SELF-COMPATIBLE SPECIES OF SOLANUM
EVOLUTION OF BARRIERS TO CROSSING OF SELF-INCOMPATIBLE WITH SELF-COMPATIBLE SPECIES OF SOLANUM
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DOI：
10.1038/hdy.1961.16
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发表时间：
1961-01-01
期刊：
影响因子：
3.8
通讯作者：
RADLOW, A
中科院分区：
文献类型：
--
作者：
GRUN, P;RADLOW, A
尽管互交通常会成功，但自交亲和的疣状茄属植物的花粉不会沿着几种二倍体茄属物种的一些自交不亲和生物型的花柱生长。这一结果与自交亲和和自交不亲和植物物种之间单向隔离的一般模型一致。单向隔离被解释为由于屏障的强大选择压力而导致，这些屏障将自交亲和基因排除在杂合的自交不亲和复合体之外。同样的自交亲和的疣状疣孢花粉确实沿着其他同样自交不亲和的生物型的花柱生长。这一结果与单向隔离的一般模型不一致。缺乏单向隔离的生物型出现在茄属自交亲和物种的地理范围之外。它们对自交亲和花粉管的接受被解释为由于多效性或未使用的阻碍引入自交亲和基因的屏障的连锁而导致的损失。
The pollen of self-compatible Solanum verrucosum will not grow down the styles of some of the self-incompatible biotypes of several diploid species of Solanum although the reciprocal crosses regularly succeed. This result is in agreement with a general model for one-way isolation between self-compatible and self-incompatible species of plants. The one-way isolation is interpreted as resulting from a strong selection pressure for barriers which keep selfcompatibility genes out of the heterozygous self-incompatible complex. The same self-compatible S. verrucosum pollen does grow down the styles of other equally self-incompa-tible biotypes. This result is in disagreement with the general modelfor one-way isolation. The biotypes which lack the one-way isolation occur outside the geographic range of self-compatible species of Solanum. Their acceptance of self-compatible pollen tubes is interpreted as resulting from a loss due to pleiotrophy or linkage of their unused barrier against introduction of genes for self-compatibility.